consulate in benghazi returned to the andrews air force base this afternoon. president obama was there and he vowed to bring justice to the men who killed them. >> even as voices of suspicious and mistrust that seek to devid countries and cultures, the united states of america will never retreat from the world. >> four people have been arrested in libya what were on the scene of the attack, but the government says they are not linked to the murders. that investigation continues and we have a live report on that now. arwa damon is with me from benghazi tonight and i know you had a chance to go to the consulate there. what did you see? >> reporter: it was really quite chilling, horrifying to be walking through some of the buildings there just imagining what had transpired, taken place. they were all burnt. there was black soot covering the walls. ashes over some of the furniture, the chandeliers. there was debris all over the floor. looters also had moved in after the attack took place pillaging this compound that even after the assault was not really secured bu